<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			console.log(100)
			console.log(077)
			console.log(0xff)
			console.log(3.14444444)
			console.log(3.5e3)
			
			console.log(typeof 100)
			
			console.log(1/0)
			console.log(0/0)
			
			console.log("hello,world!")
			console.log("hello,world!'js'")
			
			console.log(true)
			console.log(false)
			
			var a=10;
			var b=20;
			console.log(a==b)
			console.log(typeof (a==b))
			
			var c
			console.log(c)
			console.log(typeof c)
			
			var d=document.getElementById("divo1")
			console.log(d)
			console.log(typeof d)
			
		</script>
		
	</body>
</html>
